Character Creation Clothing

[P0k3r_OF_Sm0t 1]

Anybody know where I can find and edit the list of available clothes when creating a new character? 
I'm not talking about spawning with clothes, I'm talking about creating a new character through the main menu and select what items to wear. Vanilla only has hoodie, hiking pants/jeans and tennis shoes. I'd like to change or add a few more options like t-shirts and shorts.
I'd also like to be able to add hats and stuff but that's for another day.
For now I'd just like to know how to use t-shirts instead of hoodies. 

Anybody know?

Thanks in Advance,

P0k3r.